Item 7. Management’s Discussion and Analysis
Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations
You should read the following discussion and analysis together with our financial statements and related notes included elsewhere in this Annual Report. The following discussion contains forward-looking statements that involve risks and uncertainties. Our actual results could differ materially from those expressed or implied in any forward-looking statements as a result of various factors, including those set forth under the caption “Risk Factors” in Item 1A, and other documents we file with the Securities and Exchange Commission. Historical results are not necessarily indicative of future results.
Overview
We are a clinical-stage biopharmaceutical company focused on discovering and developing engineered antibody therapeutics to treat patients with cancer and autoimmune diseases, who have unmet medical needs. We use our protein engineering capabilities to design new technologies and XmAb® drug candidates with improved properties. We advance these candidates into clinical-stage development, where we are conducting Phase 1 and Phase 2 studies for a broad portfolio of programs, to determine which programs we advance into later stages of development and potentially commercialization, which programs we partner to access complementary resources to optimize development, and which programs we discontinue.
Our approach to protein design includes engineering Fc domains, the parts of antibodies that interact with multiple segments of the immune system and control antibody structure. The Fc domain is constant and interchangeable among antibodies, and our engineered XmAb Fc domains can be readily substituted for natural Fc domains.
We and our partners develop XmAb antibodies and other types of biotherapeutic drug candidates with improved properties and functionality, which can provide innovative approaches to potentially treating disease and clinical benefits over other treatment options. Applications of our protein engineering technologies include multi-specific antibodies that
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bind two or more different targets simultaneously, creating entirely new biological mechanism of anti-disease activity, or enhancement of antibody performance by increasing immune inhibitory activity, improving cytotoxicity, extending circulating half-life and stabilizing novel protein structures. Three marketed XmAb medicines have been developed with our protein engineering technologies.
Refer to Part I, Item 1, " XmAb Bispecific Fc Domain and Multi-Specific Antibody Formats " and " Other XmAb Fc Domains " in the description of our business included in this Annual Report for a discussion of our core Fc technology platforms.
Strategic Portfolio Prioritization
We are focused on developing T cell-engaging bispecific antibodies, which we believe hold great potential for the treatment of patients with solid tumors and autoimmune diseases, and beginning in the third quarter of 2023, we began aligning our portfolio to prioritize these programs, which now include XmAb819 (ENPP3 x CD3), XmAb541 (CLDN6 x CD3), plamotamab (CD20 x CD3) and XmAb657 (CD19 x CD3). We have also prioritized a potential best-in-class anti-TL1A antibody, XmAb942 (Xtend TL1A), and a research-stage TL1A x IL-23p19 bispecific antibody program.
We have implemented measures to align resources with our strategic plan for a focused pipeline and to strengthen our financial position.
In 2024, we narrowed the clinical development plan for our dual checkpoint inhibitor, vudalimab, in treating patients with advanced prostate and non-small cell lung cancers. We also concluded Phase 1 studies evaluating our XmAb564 and XmAb662 cytokine drug candidates and paused further development of both programs. In addition, our cost-sharing obligations with Genentech, related to the development of the cytokine drug candidate efbalropendekin alfa, ended as of June 1, 2024, and Genentech became responsible for all development thereafter. In June 2024, we also announced that we would regain worldwide rights to plamotamab from J&J.
In September 2024, we announced new clinical development plans for plamotamab and announced new XmAb drug candidates to be evaluated for the treatment of patients with autoimmune and inflammatory diseases. We subsequently completed an underwritten public offering of common stock and pre-funded warrants, and we received gross proceeds of $201.3 million before deducting underwriting discounts, commissions and offering expenses.
During 2024, we initiated first-in-human studies to evaluate XmAb541, a first-in-class bispecific antibody being developed for patients with CLDN6-positive tumors including advanced ovarian cancer, and XmAb942, our high potency anti-TL1A antibody with extended half-life in development for people living with inflammatory bowel disease (IBD).
In early 2025, we paused further development of vudalimab and decided not to initiate expansion cohorts of XmAb808 in combination with pembrolizumab. Potential combination of XmAb808 with CD3 T-cell engaging bispecific antibodies is being evaluated.
As of December 31, 2024, we had $706.7 million in cash, cash equivalents and marketable debt securities, and based on our current plans and projections, we estimate this will provide necessary funding into 2028.
Advancements in Our Clinical Portfolio of XmAb Drug Candidates
Our modular XmAb bispecific technology and protein engineering capabilities enable us to rapidly advance multiple drug candidates into clinical development. We are currently enrolling Phase 1 clinical studies for three wholly owned candidates to treat patients with many different types of serious diseases: XmAb819, XmAb541 and XmAb942. Two additional drug candidates are planned to enter clinical development in 2025: plamotamab and XmAb657.
Oncology Programs
XmAb819 (ENPP3 x CD3): XmAb819 is a first-in-class, tumor-targeted, T-cell engaging XmAb 2+1 bispecific antibody in development for patients with clear cell renal cell carcinoma (ccRCC). XmAb819 engages the immune system and activates T cells for highly potent and targeted lysis of tumor cells expressing ENPP3, an antigen highly expressed on kidney cancers. ENPP3 is a differentially expressed target, with high level expression in RCC and low level expression on normal tissues. With two tumor-antigen binding domains and one T-cell binding domain, our XmAb 2+1 format enables antibodies to bind more avidly and selectively kill tumor cells with higher antigen density, potentially sparing normal cells.
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We are conducting a Phase 1 study to evaluate XmAb819 in patients with advanced ccRCC. In September 2024, we announced that initial evidence of anti-tumor activity had been observed in dose-escalation cohorts in the ongoing Phase 1 study, including RECIST responses, and the duration of treatment for several patients in earlier dose cohorts has extended beyond one year. Cytokine release syndrome remained manageable, and the tolerability profile from recent dose cohorts, including no maximum tolerated dose being reached, supported continued dose escalation toward target dose levels.
XmAb541 (CLDN6 x CD3): XmAb541 is a first-in-class, tumor-targeted, T-cell engaging XmAb 2+1 bispecific antibody in development for patients with CLDN6 expressing tumor types including ovarian cancer. XmAb541 targets CLDN6, a tumor-associated antigen in ovarian cancer and other solid tumors, and CD3. The XmAb 2+1 multivalent format used in XmAb541 enables greater selectivity for CLDN6 over similar Claudin family members, such as CLDN9, CLDN3 and CLDN4. In April 2024, we dosed the first patient in a Phase 1 dose-escalation study XmAb541. The Phase 1 dose-escalation study is ongoing, with characterization of target dose levels anticipated to begin during 2025.
XmAb808 (B7-H3 x CD28): XmAb808 is a tumor-selective, co-stimulatory CD28 bispecific antibody that binds to the broadly expressed tumor antigen B7-H3 and is constructed with the XmAb 2+1 multivalent format. Co-stimulation is required for T cells to achieve full activation, and targeted CD28 bispecific antibodies may provide conditional co-stimulation of T cells when the antibodies are bound to tumor cells.
We are conducting a Phase 1 study to evaluate XmAb808 in combination with pembrolizumab in patients with advanced solid tumors. In September 2024, we presented a clinical update on the ongoing Phase 1 study. The majority of patients enrolled into the study were men with mCRPC. In this group of patients, prostate specific antigen (PSA) declines were observed during the four-week monotherapy safety run-in period. In November 2024, we announced that within the range of expected active doses, two patients experienced dose-limiting toxicities as defined in the study protocol. The maximum tolerated dose was not defined per protocol. As the data were analyzed, back-fill enrollment proceeded in the next lower dose cohort, a dose within the range of target doses which was determined to be tolerable.
Dose escalation resumed late in the fourth quarter of 2024, and enrollment in the final dose-escalation cohort is complete. Data from the study are expected to inform future development decisions for the program. Potential combination with CD3 T-cell engaging bispecific antibodies is being evaluated.
Vudalimab (PD-1 x CTLA-4): Vudalimab is a bispecific antibody that targets PD-1 and CTLA-4, two immune checkpoint receptors, to selectively activate the tumor microenvironment. In February 2024, we announced data from a Phase 2 study of vudalimab in patients with clinically-defined high-risk mCRPC, in which the initial data indicated that vudalimab monotherapy was generally well tolerated and was associated with response to treatment in multiple patients who had visceral or lymph node metastases. In March 2024, we disclosed additional clinical data showing the (i) characteristics of patients with clinical response (n=5/12) and (ii) per label rates of immune-mediated hepatitis for ipilimumab (anti-CTLA-4; 1 mg/kg) + nivolumab (anti-PD-1; 3 mg/kg) combination treatment as generally comparable to the rate of all hepatobiliary disorder adverse events including immune-mediated hepatitis for vudalimab among all patients treated at doses greater than or equal to 10 mg/kg.
In the fourth quarter of 2024, we completed enrollment in two studies of vudalimab in patients with mCRPC and in Part 1 of a study in patients with locally advanced or metastatic non-small cell lung cancer. Xencor has paused further development of vudalimab and has prioritized resources to advance other pipeline programs. Safety data from the three studies of vudalimab remain consistent with prior data disclosures.
XmAb564 (IL2-Fc Cytokine): XmAb564 is a monovalent interleukin-2 Fc (IL2-Fc) fusion protein engineered to selectively activate and expand regulatory T cells (Tregs) for the potential treatment of patients with autoimmune diseases. In the first half of 2024, we concluded a Phase 1b study that was evaluating the safety and tolerability of multiple ascending doses of XmAb564, administered subcutaneously in patients, and we have paused further development.
XmAb662 (IL12-Fc Cytokine): XmAb662 is a potency-reduced interleukin-12 Fc (IL12-Fc) fusion protein engineered to increase anti-tumor activity and immunogenicity in the tumor microenvironment by promoting high levels of interferon gamma secretion from T cells and NK cells. In the first half of 2024, we concluded a Phase 1 study that was evaluating XmAb662 in patients with advanced solid tumors, and we have paused further development.
Autoimmune Disease Programs
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In September 2024, we announced new clinical development plans for plamotamab and announced new XmAb drug candidates to be evaluated for the treatment of patients with autoimmune and inflammatory diseases. We believe that plamotamab and XmAb657 could address significant unmet needs for patients with a wide-range of autoimmune diseases that could be responsive to targeted B-cell depletion, such as RA, multiple sclerosis, advanced systemic lupus erythematosus, ANCA associated vasculitis, idiopathic inflammatory myopathy, myasthenia gravis, neuromyelitis optica spectrum disorder, pemphigus vulgaris, Sjogren’s syndrome, and systemic sclerosis. We believe that XmAb942 could address significant unmet medical needs for patients with IBD, such as Crohn’s disease and ulcerative colitis, the two most common forms of IBD.
XmAb942 (Xtend TL1A): XmAb942 is a monospecific anti-TL1A antibody, utilizing Xencor’s Xtend Fc domain and proprietary Fc silencing technology, with potentially class-leading potency, and is under development for patients with IBD. The two most common forms of IBD are Crohn’s disease and ulcerative colitis. In October 2024, preclinical data were presented during United European Gastroenterology (UEG) Week. Preclinical half-life was 23 days, potentially supporting an 8- to 12-week dosing regimen in humans. In the fourth quarter of 2024, we initiated dosing of healthy volunteers in the first-in-human study of XmAb942, and we expect initial single-ascending dose data from a Phase 1 study in healthy volunteers during the first half of 2025. We continue to expect data from the multiple-ascending dose portion of study and the initiation of a Phase 2 study in patients with ulcerative colitis in the second half of 2025.
Plamotamab (CD20 x CD3): Plamotamab is a B-cell depleting bispecific T-cell engager that targets CD20, a target receptor on B cells, and CD3. Results from the expansion portion of a Phase 1 study indicate that intravenous plamotamab monotherapy was well tolerated and demonstrated encouraging clinical activity in heavily pretreated patients with an advanced form of lymphoma at the recommended Phase 2 intravenous dose. In 2023, we completed patient enrollment in subcutaneous dose escalation cohorts of the Phase 1 study. We had been co-developing plamotamab with Johnson & Johnson (J&J), and in June 2024, we regained exclusive worldwide rights to develop and commercialize the candidate.
We plan to initiate a Phase 1b/2a proof-of-concept study for plamotamab in RA in the first half of 2025. The Phase 1b portion of the study will select a priming and step-up dose regimen based on the regimen established in oncology, and will assess the initial safety, efficacy, and biomarkers of plamotamab in patients with RA. The selected dose regimen will then be evaluated in the randomized Phase 2a portion, with efficacy determined at week 12. Results from the Phase 1 study in hematologic cancers showed favorable tolerability and comparable preliminary efficacy data, when cross compared to results from studies of a competitor molecule within the class, with similar patient baseline characteristics. Data demonstrating deep peripheral B-cell depletion observed in patients with lymphoma were presented at a medical meeting in December 2024. Based on these clinical outcomes, significant B-cell depletion, and the emergent biology supportive of B-cell targeted T cell engagers for the treatment of patients with autoimmune diseases, we plan to evaluate plamotamab in RA, in which patients progressed through prior standard of care treatment.
Additional Clinical-Stage XmAb Drug Candidate
XmAb7195 (anti-IgE) : XmAb7195 uses our XmAb Immune Inhibitor Fc Domain and is designed to reduce blood levels of IgE, which mediates allergic responses and allergic disease. In February 2020, we licensed this drug candidate to Aimmune Therapeutics, Inc., now a wholly owned subsidiary of Nestlé S.A. We reacquired exclusive worldwide rights to XmAb7195 in 2024 and are evaluating development opportunities.
Advancements Expanding XmAb Bispecific Platforms
We conduct further research into the function and application of antibody Fc domains in order to expand the scope of our XmAb technology platforms and identify additional XmAb drug candidates.
We use the modularity of our XmAb bispecific Fc technology to build antibody-based therapeutics in a variety of formats, such as T cell engaging bispecific antibodies of a mixed valency format, the XmAb 2+1 bispecific antibody. XmAb 2+1 bispecific antibodies may preferentially kill target cells with high target expression, which may be especially beneficial in designing antibodies that target solid tumors or B cells that drive autoimmune disease. This selectivity potentially empowers T cell engaging bispecifics to address an expanded set of tumor antigens. Five clinical-stage programs utilize our XmAb 2+1 format: XmAb819, XmAb808, XmAb541, xaluritamig and ASP2138. We plan to initiate a Phase 1 study for an additional XmAb 2+1 bispecific antibody candidate, XmAb657 (CD19 x CD3), which we are developing for patients with autoimmune diseases, in the second half of 2025.
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Progress Across Partnerships
A key part of our business strategy is to leverage our protein engineering capabilities, XmAb technologies and drug candidates with partnerships, collaborations and licenses. Through these arrangements we generate revenues in the form of upfront payments, milestone payments and royalties. For partnerships for our drug candidates, we aim to retain a major economic interest in the form of keeping major geographic commercial rights; profit-sharing; co-development options; and the right to conduct studies with drug candidates developed in the collaboration. The types of arrangements that we have entered with partners include product licenses, novel bispecific antibody collaborations, technology licensing agreements and strategic collaborations.
Product Licenses
Product licenses are arrangements in which we have internally developed drug candidates and, based on a strategic review, licensed partial or full rights to third parties to continue development and potential commercialization. We seek partners that can provide infrastructure and resources to successfully develop our drug candidates, have a track record of successfully developing and commercializing medicines, or have a portfolio of development-stage candidates and commercialized medicines which could potentially be developed in rational combinations with our drug candidates.
The FDA approved Monjuvi® (tafasitamab-cxix) under accelerated approval in July 2020. Monjuvi is a CD19-directed cytolytic antibody indicated in combination with lenalidomide for the treatment of adult patients with relapsed or refractory diffuse large B-cell lymphoma (DLBCL) not otherwise specified, including DLBCL arising from low grade lymphoma, and who are not eligible for autologous stem cell transplant (ASCT). This indication is approved under accelerated approval based on overall response rate. Continued approval for this indication may be contingent upon verification and description of clinical benefit in a confirmatory trial(s). In August 2021, the European Commission granted conditional marketing authorization for Minjuvi® (tafasitamab) in combination with lenalidomide, followed by tafasitamab monotherapy, for the treatment of adult patients with relapsed or refractory diffuse large B-cell lymphoma (DLBCL) who are not eligible for ASCT. In December 2024, Incyte announced positive full results from the pivotal study of tafasitamab in combination with lenalidomide and rituximab in relapsed or refractory follicular lymphoma and submitted a supplemental Biologics License Application. Tafasitamab was created and initially developed by us. Tafasitamab is marketed by Incyte Corporation under the brand name Monjuvi in the U.S. and under the brand name Minjuvi in Europe and Canada. Incyte has exclusive commercialization rights to tafasitamab outside the U.S. Monjuvi® and Minjuvi® are registered trademarks of Incyte. In February 2024, Incyte acquired exclusive global development and commercialization rights to tafasitamab. In November 2023, we entered into a royalty purchase agreement (Monjuvi Royalty Sale Agreement) with OCM Life Sciences Portfolio LP (OMERS). Under the terms of the Monjuvi Royalty Sale Agreement, we received $22.5 million upon closing in exchange for royalties earned from our MorphoSys license after July 1, 2023. The aggregate Monjuvi royalties to be received by OMERS have a fixed cap of 130% of the purchase price after which the royalties revert to us. In 2024, we earned non-cash royalty revenue of $8.7 million on net sales of Monjuvi.
Efbalropendekin alfa is a reduced-potency IL15/IL15Rα-Fc fusion protein that incorporates our Xtend extended half-life technology, and we had co-developed this program in collaboration with Genentech, a member of the Roche Group. In the fourth quarter of 2023, we agreed with Genentech to convert our development cost and profit-sharing arrangement into a royalty and milestone payment-based arrangement. Pursuant to the terms of the amended agreement with Genentech, effective June 1, 2024, Genentech assumed sole responsibility over all clinical, regulatory and commercial activities. Genentech is not currently enrolling new patients into studies evaluating efbalropendekin alfa.
Novel Bispecific Antibody Collaborations
Novel bispecific antibody collaborations are arrangements in which our partner seeks to create a bispecific antibody using one or more of our XmAb bispecific technologies. Our partners provide an antibody or a tumor-associated antigen, and we conduct limited research and development to create potential bispecific antibody candidates for further development and commercialization by our partners.
Xaluritamig is a STEAP1 x CD3 2+1 XmAb bispecific T-cell engager that our partner Amgen is advancing for the treatment of patients with prostate cancer. The XmAb 2+1 multivalent format enables higher binding capability for STEAP1 expressing cells. Results from a Phase 1 study evaluating xaluritamig in patients with mCRPC were presented at the European Society for Medical Oncology (ESMO) Congress in September 2024. With a median follow-up time of 27.9 months, the median overall survival (OS) was 17.7 months across all cohorts. A PSA90 rate of 45.1% was also observed in high-dose cohorts, and PSA90 response was associated with survival (p = 0.0044), which Amgen believes could potentially serve as an early indicator for benefit in these patients. Amgen initiated a Phase 3 study of xaluritamig in patients with
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mCRPC who have previously been treated with taxane-based chemotherapy. Multiple Phase 1 or Phase 1b studies evaluating xaluritamig as a monotherapy or in combination are enrolling patients with earlier prostate cancer. In 2024, we earned $30.0 million in milestone revenue from Amgen.
Technology License Agreements
We enter into technology licensing agreements in which we license access to one or more of our XmAb Fc technologies on a restricted basis, typically to an XmAb Cytotoxic Fc Domain and/or the Xtend Fc Domain. Our partners are responsible for all research, development and commercialization activities of the drug candidates. The plug-and-play nature of XmAb technologies allows us to license access to our platforms with limited or no internal research and development activities.
Alexion’s Ultomiris® uses Xtend Fc technology for longer half-life. Ultomiris has received marketing authorizations in global markets for the treatment of patients with paroxysmal nocturnal hemoglobinuria (PNH), for certain patients with atypical hemolytic uremic syndrome (aHUS), for certain patients with generalized myasthenia gravis (gMG) and for certain patients with neuromyelitis optica spectrum disorder (NMOSD). Ultomiris was approved in the U.S. for the treatment of adult patients with anti-aquaporin-4 antibody-positive NMOSD in March 2024. Alexion is also evaluating Ultomiris in a broad development program across additional hematology, nephrology and neurology indications. In 2024, we earned $58.2 million in non-cash royalty revenue from the Ultomiris Royalty Sale Agreement.
In March 2020, we entered a second agreement with Vir, under which Vir has non-exclusive access to our Xtend Fc technology to extend the half-life of novel antibodies Vir investigated as potential treatments for patients with COVID-19. In May 2021, the FDA granted EUA to sotrovimab for the early treatment of mild-to-moderate COVID-19 in adults and pediatric patients (12 years of age and older weighing at least 40 kg) with positive results of direct severe SARS-CoV-2 viral testing, and at high risk for progression to severe COVID-19, including hospitalization or death. Sotrovimab has also obtained emergency authorization, temporary authorization or marketing approval (under the brand name Xevudy®) for early treatment of COVID-19 in more than 30 countries. In March 2022, the FDA deauthorized sotrovimab’s use in all U.S. regions due to increases in the proportion of COVID-19 cases caused by non-susceptible new variants. As the SARS-CoV-2 virus has mutated, our royalty revenue from the sales of sotrovimab has diminished significantly. In 2024, we earned $0.6 million in royalties from Vir.
In June 2016, we entered into an agreement with Novartis Institutes for BioMedical Research, Inc. in which we provided Novartis with a non-exclusive license to certain of our Fc technologies to apply against up to ten targets identified by Novartis. In 2024, Novartis initiated a Phase 2 clinical study with a program developed under the agreement, and we earned $4.0 million in milestone revenue from Novartis.
Refer to Not e 10 in the accompanying notes to the consolidated financial statements included in
Part II, Item 8. Consolidated Financial Statements and Supplementary Dat a in this Annual Report for a description of the key terms of our arrangements.
Financial Operations Overview
Revenues
Our revenues to date have been generated primarily from our collaboration agreements, our product licensing agreements, and our technology licensing agreements. Revenue recognized from our collaboration and product licensing agreements includes non-refundable upfront payments, milestone payments and royalties on net sales of approved products while revenue from our technology licensing agreements includes upfront payments, option payments to obtain commercial licenses, milestone payments and royalties on net sales of approved products. Since our inception through December 31, 2024, we have generated $1.3 billion in revenues under the various product development partnership and technology license arrangements. Several of our product development partnership and technology license agreements provide us the opportunity to earn future milestone payments, royalties on product sales and option exercise payments. In 2023, we sold a portion of the rights to receive royalties and a milestone payment under our MorphoSys and Alexion arrangements for $215.0 million.
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Summary of Collaboration and Licensing Revenue by Partner
The following is a comparison of collaboration, product licensing, and technology licensing revenue for the years ended December 31, 2024 and 2023 (in millions):
Year Ended
December 31,
2024 2023
Alexion* $ 58.2 $ 64.9
Amgen 30.0 —
Gilead — 6.0
Janssen — 77.8
Mabgeek 1.5 —
MorphoSys/Incyte* 8.7 8.7
Novartis 4.0 —
Omeros — 5.0
Vega 0.5 —
Vir 0.6 2.2
Zenas — 10.0
Third Party Licensee 7.0 —
Total $ 110.5 $ 174.6
*Includes non-cash royalty revenue from the Ultomiris and Monjuvi Royalty Sale Agreements.
Research and Development Expenses
The following is a comparison of research and development expenses for the years ended December 31, 2024 and 2023 (in millions):
Year Ended
December 31,
2024 2023
External research and development expenses $ 105.8 $ 119.7
Internal research and development expenses 91.9 99.4
Stock-based compensation 30.0 34.5
Total $ 227.7 $ 253.6
Internal research and development expenses consist primarily of salaries, benefits, related personnel costs, supplies, and allocated overhead including facility costs. External research and development expenses include preclinical testing costs, clinical trial costs and fees paid to external service providers. External service providers include CROs and contract manufacturing organizations (CMOs) to conduct clinical trials, manufacturing and process development, IND-enabling toxicology testing and formulation of clinical drug supplies. We expense research and development expenses as incurred. We account for nonrefundable advance payments for goods and services that will be used in future research and development activities as expense when the service has been performed or when the goods have been received. We estimate contract manufacturing, preclinical study and clinical trial expenses based on the services performed pursuant to the contracts with manufacturing, research institutions and clinical research organizations that manufacture and conduct and manage preclinical studies and clinical trials on our behalf based on the actual time and expenses incurred by them. We accrue expenses related to clinical trials based on the level of patient enrollment and activity according to the related agreement. We monitor patient enrollment levels and related activity to the extent reasonably possible and adjust estimates accordingly. Our estimates of clinical trial expense have fluctuated on a period-to-period basis due to changes in the stage of the clinical trials and patient enrollment levels. We expect to experience a continuing pattern of fluctuations in clinical trial expenses as current clinical trials are completed and as we initiate additional and later stage clinical trials. We expect
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changes in future clinical trial expenses to be driven by changes in service provider costs and changes in clinical stage and patient enrollment.
We expect that our future research and development expenses will increase over spending levels in recent years if we are successful in advancing our current clinical-stage drug candidates or any of our preclinical programs into later stages of clinical development. The process of conducting preclinical studies and clinical trials necessary to obtain regulatory approval is costly and time-consuming. We or our partners may never succeed in achieving marketing approval for any of our product candidates. Numerous factors may affect the probability of success for each product candidate, including preclinical data, clinical data, competition, manufacturing capability, approval by regulatory authorities and commercial viability.
Our research and development operations are conducted such that design, management and evaluation of results of all of our research and development is performed internally, while the execution of certain phases of our research and development programs, such as toxicology studies in accordance with Good Laboratory Practices (GLP), and manufacturing in accordance with cGMP, is accomplished using CROs and CMOs. We account for research and development costs on a program-by-program basis except in the early stages of research and discovery, when costs are often devoted to identifying preclinical candidates and improving our discovery platform and technologies, which are not necessarily allocable to a specific development program. We assign costs for such activities to distinct projects for preclinical pipeline development and new technologies. We allocate research management, overhead, commonly used laboratory supplies and equipment, and facility costs based on the percentage of time of full-time research personnel efforts on each program.
The following is a comparison of research and development expenses for the years ended December 31, 2024 and 2023 (in millions):
Year Ended
December 31,
2024 2023
Product programs:
Vudalimab (PD-1 x CTLA-4) $ 45.4 $ 43.9
XmAb819 (ENPP3 x CD3) 28.2 18.1
XmAb808 (B7-H3 x CD28) 21.2 16.6
XmAb541 (CLDN6 x CD3) 15.5 20.3
XmAb942 (Xtend TL1A) 31.6 2.3
Plamotamab (CD20 x CD3)* 15.7 16.5
XmAb657 (CD19 x CD3) 5.9 —
Efbalropendekin alfa (IL15/IL15Ra-Fc)* 13.2 14.1
Other, research and early stage programs 33.5 50.3
Wind down costs of terminated programs (1)
17.5 71.5
Total research and development expenses $ 227.7 $ 253.6
*Includes net reimbursements to and from our partners pursuant to agreements that include cost-sharing arrangements.
(1) Research and development expenses include wind down costs of terminated programs including the vibecotamab, tidutamab, XmAb841, XmAb104, XmAb662 and XmAb564 programs.
General and Administrative Expenses
General and administrative expenses consist primarily of salaries and related benefits, including stock-based compensation related to our executive, finance, business development, and support functions. Other general and administrative expenses include intellectual property costs, facility costs, and professional fees for auditing, tax and legal services.
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Other Income (Expense), Net
For the year ended December 31, 2024, other expense, net, consists primarily of non-cash interest expense related to the Ultomiris and Monjuvi Royalty Agreements, an impairment expense related to the investment in Zenas' preferred stock, and unrealized losses on marketable equity securities, partially offset by interest income from marketable debt securities during the year, while for the year ended December 31, 2023, other income, net, consists primarily of interest income from marketable debt securities, partially offset by non-cash interest expense related to the Ultomiris and Monjuvi Royalty Agreements during the year.
Critical Accounting Policies, Significant Judgments, and Estimates
Our management’s discussion and analysis of our financial condition and results of operations is based on our financial statements, which have been prepared in accordance with accounting principles generally accepted in the United States (GAAP). The preparation of our financial statements in conformity with GAAP requires our management to make estimates and assumptions that affect the amounts and disclosures reported in the financial statements and accompanying notes. Actual results could differ materially from those estimates. Our management believes judgment is involved in determining revenue recognition, interest expense under the royalty sale agreements, the fair value-based measurement of stock-based compensation, the fair value estimate of marketable securities, the capitalization and recoverability of intellectual property costs, valuation of deferred tax assets and accruals. Our management evaluates estimates and assumptions as facts and circumstances dictate. As future events and their effects cannot be determined with precision, actual results could differ from these estimates and assumptions, and those differences could be material to the financial statements. If our assumptions change, we may need to revise our estimates, or take other corrective actions, either of which may also have a material adverse effect on our statements of operations, liquidity and financial condition.
While our significant accounting policies are described in more detail in Note 1 in the accompanying notes to the consolidated financial statements included in Part II, Item 8. Consolidated Financial Statements and Supplementary Data , we believe the following accounting policies to be critical to the judgments and estimates used in the preparation of our financial statements.
Revenue Recognition
We have, to date, earned revenue from research and development collaborations, which may include research and development services, licenses of our internally developed technologies, licenses of our internally developed drug candidates, or combinations of these.
The terms of our license and research and development and collaboration agreements generally include non-refundable upfront payments, research funding, co-development reimbursements, license fees, and milestone and other contingent payments to us for the achievement of defined collaboration objectives and certain clinical, regulatory and sales-based events, as well as royalties on sales of any commercialized products.
The terms of our licensing agreements include non-refundable upfront fees, contractual payment obligations for the achievement of pre-defined preclinical, clinical, regulatory and sales-based events by our partners. The licensing agreements also include royalties on sales of any commercialized products by our partners.
In certain transactions for licensing of our technologies or our product candidates, we may receive an equity interest from our partners as full or partial consideration for an upfront payment due under the arrangement. We record the initial equity at its fair value and mark the value to market quarterly for publicly traded securities and review for impairment for equity that is not publicly traded on a national exchange.
Sale of Future Royalties
In November 2023, we entered into the sale of a portion of our royalties due to us under the Alexion Agreement (the Ultomiris Royalty Sale Agreement) and a portion of our royalties due to us under the MorphoSys Agreement (the Monjuvi Royalty Sale Agreement) and received upfront proceeds of $192.5 million and $22.5 million, respectively.
We evaluated both the Ultomiris Royalty Sale Agreement and the Monjuvi Royalty Sale Agreement under Accounting Standards Codification (ASC) 470 —Debt (ASC 470) and determined that the upfront payment should be accounted for as a liability in the consolidated balance sheet. The upfront proceeds will be amortized using the effective
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interest rate method over the estimated life of the related expected royalty stream. The liability and related interest expense are based on our current estimates of future royalties to be paid over the life of the agreement. We periodically assess the expected royalty payments and to the extent the future estimates or timing of such payments are materially different than the previous estimates, we will prospectively recognize related interest expense. Royalty revenue is recognized as earned on net sales of Ultomiris and Monjuvi/Minjuvi, and the liability is reduced when payments are made to the purchaser. For the year ended December 31, 2024, we recorded $66.9 million of non-cash royalty revenue related to the royalty sales under both agreements. For further discussion, refer to Note 11 in the accompanying notes to the consolidated financial statements included in Part II, Item 8. Consolidated Financial Statements and Supplementary Data .
Capitalized Intellectual Property Costs
We capitalize and amortize third-party intellectual property costs such as amounts paid to outside patent counsel for filing, prosecuting and obtaining patents for our internally developed technologies and product candidates, to the extent such patents are deemed to have probable future economic benefit. We also capitalize amounts paid to third parties for licenses that we acquire for intellectual property or for research and development purposes where the technology has alternative uses. The net capitalized patents, licenses, and other intangible assets as of December 31, 2024 and 2023 were $18.5 million and $18.7 million, respectively. We believe that these costs should be capitalized as the intellectual property portfolio creates the underlying property right to our technologies and product candidates and supports the upfront payments, licensing fees, milestone payments and royalties made by our collaboration partners for licensing our technologies and product candidates.
We begin amortization of capitalized patent costs during the period that we obtain a patent relating to the capitalized cost over the shorter of the patent life or the estimated economic useful life. Capitalized licensing costs are amortized beginning in the period that access to the license or technology is available and is amortized over the shorter of the license term or the estimated economic useful life of the licensed asset. Such amortization is recorded as general and administrative expenses.
On a regular basis we review the capitalized intellectual property portfolio and determine if there have been changes in the scientific or patent landscape that leads us to decide to abandon an in-process patent application or abandon a previously issued patent. While we confer with outside patent counsel, the decision to continue prosecuting certain patent claims or abandon other claims are made by us based on our judgment and existing knowledge of our technology, current U.S. and foreign patent authority rulings and expected rulings, and scientific advances and patent filings by competitors operating in our technology or drug development field. We record an expense for the write-off of capitalized intangible assets in the period that the decision to abandon a claim or license is made. We also review the carrying value of capitalized licensing costs on a regular basis to determine if there have been any changes to the useful life or estimated amortization period over which the costs should be amortized. We recorded a charge for abandoned intangible assets of $2.3 million and $1.3 million for the years ended December 31, 2024 and 2023, respectively. Such charges are reflected as general and administrative expenses.
We determine if there has been an impairment of our intangible assets which include the capitalized patent and licensing costs whenever events such as recurring operating losses or changes in circumstances indicate that the carrying amount of the assets may not be recoverable.
Accrued Research and Development Expenses
As part of the process of preparing our financial statements, we are required to estimate our accrued research and development expenses. This process involves reviewing contracts and purchase orders, reviewing the terms of our license agreements, communicating with our applicable personnel to identify services that have been performed on our behalf, and estimating the level of service performed and the associated cost incurred for the service when we have not yet been invoiced or otherwise notified of actual cost. The majority of our service providers invoice us monthly in arrears for services performed. We make estimates of our accrued expenses as of each balance sheet date based on facts and circumstances known to us at that time. We periodically confirm the accuracy of our estimates with the service providers and make adjustments if necessary. Examples of estimated accrued research and development expenses include fees to:
• CROs and other service providers in connection with clinical studies;
• contract manufacturers in connection with the production of and testing of clinical trial materials; and
• vendors in connection with preclinical development activities.
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We base our expenses related to clinical studies on our estimates of the services received and efforts expended pursuant to contracts with multiple research institutions and CROs that conduct and manage clinical studies on our behalf. The financial terms of these agreements are subject to negotiation, vary from contract to contract, and may result in uneven payment flows and expense recognition. Payments under some of these contracts depend on factors such as the successful enrollment of patients and the completion of clinical trial milestones. In accruing these costs, we estimate the time period over which services will be performed for which we have not been invoiced and the level of effort to be expended in each period. If the actual timing of the performance of services or the level of effort varies from our estimate, we adjust the accrual accordingly. Our understanding of the status and timing of services performed relative to the actual status and timing of services performed may vary and may result in our reporting changes in estimates in any particular period.
Income Taxes
Deferred tax assets and liabilities are determined based on differences between the financial reporting and tax basis of assets and liabilities and are measured using the enacted tax rates and laws that are expected to be in effect when the differences are expected to reverse. The effect on deferred tax assets and liabilities of a change in tax rates is recognized as income in the period that such tax rate changes are enacted. The measurement of a deferred tax asset is reduced, if necessary, by a valuation allowance if it is more likely than not that some portion or all of the deferred tax asset will not be realized. Financial statement recognition of a tax position taken or expected to be taken in a tax return is determined based on a more likely than not threshold of that position being sustained. If the tax position meets this threshold, the benefit to be recognized is measured as the largest amount that is more than 50% likely to be realized upon ultimate settlement. Our policy is to record interest and penalties related to uncertain tax positions as a component of income tax expense. We have unrecognized tax benefits of $8.9 million as of December 31, 2024 and 2023. Interest and penalties of $1.7 million have been recorded through the year ended December 31, 2024.
On December 22, 2017, the Tax Cuts and Jobs Act of 2017 (TCJA) was enacted into law, which beginning in 2018, made several changes to U.S. corporate income tax provisions including a reduction in the U.S. corporate rate from a maximum rate of 35% to 21% effective January 1, 2018. The TCJA also allowed net operating losses (NOLs) incurred after January 1, 2018 to be carried forward indefinitely subject to limitations on the amount of NOLs that could be applied against taxable income each year. The TCJA also requires capitalization of certain research and development expenses beginning effective January 1, 2022.
We recorded net deferred tax assets of $227.3 million as of December 31, 2024, which was fully offset by a valuation allowance due to uncertainties surrounding our ability to realize these tax benefits. The deferred tax assets are primarily comprised of deferred revenue, capitalized research and development expenses, federal and state tax net operating loss (NOL) carryforwards and research and development tax credit carryforwards. As of December 31, 2024, we had cumulative net operating loss carryforwards for federal income tax purposes of approximately $114.3 million; $60.1 million of such losses were incurred during the year ended December 31, 2024. We also had available tax credit carryforwards of $26.0 million for federal tax purposes. We had cumulative state tax loss carryforwards at December 31, 2024 of $176.9 million, and available state tax credit carryforwards of approximately $28.4 million, which can be carried forward to offset future taxable income, if any.
Our federal net operating loss carryforwards incurred prior to January 1, 2018 expire starting in 2027; state net operating loss carryforwards expire starting in 2035; and federal tax credit carryforwards expire starting in 2034.
We recorded income tax expense of $1.6 million and $13.7 million for the years ended December 31, 2024 and 2023, respectively.
Valuation of Stock-Based Compensation
We record the fair value of stock options and shares issued under our Employee Stock Purchase Plan (ESPP) to employees as of the grant date as compensation expense over the service period, which is generally the vesting period. For non-employees, we also record the fair value of stock options as of the grant date as compensation expense over the service period. We then periodically re-measure the awards to reflect the current fair value at each reporting period until the non-employee completes the performance obligation or the date on which a performance commitment is reached. Expense is recognized over the related service period.
We calculate the fair value of stock-based compensation awards using the Black-Scholes option-pricing model. The Black-Scholes option-pricing model requires the use of subjective assumptions, including volatility of our common
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stock, the expected term of our stock options, the risk-free interest rate for a period that approximates the expected term of our stock options and the fair value of the underlying common stock on the date of grant.
Common Stock Options Fair Value
We recognize stock-based compensation expense in accordance with the provisions of ASC 718, Compensation—Stock Compensation . The use of a Black-Scholes model requires us to apply judgment and make assumptions and estimates that include the following:
• Expected Volatility —Volatility is a measure of the amount by which a financial variable such as a share price has fluctuated (historical volatility) or is expected to fluctuate (expected volatility) during a period.
• Expected Dividend Yield —We have never declared or paid dividends and have no plans to do so in the foreseeable future.
• Risk-Free Interest Rate —This is the U.S. Treasury rate for the week of each option grant during the year, having a term that most closely resembles the expected life of the option.
• Expected Term —This is the period of time that the options granted are expected to remain unexercised. Options granted have a maximum term of ten years and we have estimated the expected life of the option term to be between six and eight years. We use a simplified method to calculate the average expected term for employee awards.
Results of Operations
The discussion that follows includes a comparison of our results of operations and liquidity and capital resources for the years ended December 31, 2024 and 2023. For a comparison of our results of operations and financial condition for the years ended December 31, 2023 and 2022, see “Item 7 – Management’s Discussion and Analysis of Financial Condition and Results of Operations” in our 2023 Annual Report on Form 10-K/A, filed with the SEC on February 24, 2025.
Comparison of the Years Ended December 31, 2024 and 2023
The following table summarizes our results of operations for the years ended December 31, 2024 and 2023 (in millions):
Year Ended December 31,
2024 2023 Change
Revenues:
Research collaboration $ — $ 30.3 $ (30.3)
Milestone 34.5 88.5 (54.0)
Licensing 8.5 — 8.5
Royalties 67.5 55.8 11.7
Total revenues 110.5 174.6 (64.1)
Operating expenses:
Research and development 227.7 253.6 (25.9)
General and administrative 61.2 53.4 7.8
Total operating expenses 288.9 307.0 (18.1)
Other income (expense), net
(56.5) 12.7 (69.2)
Income tax expense 1.6 13.7 (12.1)
Net loss
(236.5) (133.4) (103.1)
Net loss attributable to non-controlling interest
(3.9) (0.2) (3.7)
Net loss attributable to Xencor, Inc.
$ (232.6) $ (133.2) $ (99.4)
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Revenues
There were no research collaboration revenues in 2024 and research collaboration revenues in 2023 are primarily revenue recognized under the Second J&J Agreement. Milestone payments decreased by $54.0 million in 2024 from 2023 amounts primarily due to milestone revenues recognized from Amgen and Novartis in 2024, as compared to milestone revenue recognized from Alexion, Gilead, J&J, Omeros, and Zenas in 2023. Royalty revenues for 2024 are higher than royalty revenues in 2023 primarily due to an increase in royalty revenue recognized from Alexion.
Research and Development Expenses
The following table summarizes our research and development expenses for the years ended December 31, 2024 and 2023 (in millions):
Year Ended
December 31,
2024 2023 Change
Product programs:
Vudalimab (PD-1 x CTLA-4) $ 45.4 $ 43.9 $ 1.5
XmAb819 (ENPP3 x CD3) 28.2 18.1 10.1
XmAb808 (B7-H3 x CD28) 21.2 16.6 4.6
XmAb541 (CLDN6 x CD3) 15.5 20.3 (4.8)
XmAb942 (Xtend TL1A) 31.6 2.3 29.3
Plamotamab (CD20 x CD3)* 15.7 16.5 (0.8)
XmAb657 (CD19 x CD3) 5.9 — 5.9
Efbalropendekin alfa (IL15/IL15Ra-Fc)* 13.2 14.1 (0.9)
Other, research and early stage programs 33.5 50.3 (16.8)
Wind down costs of terminated programs (1)
17.5 71.5 (54.0)
Total research and development expenses $ 227.7 $ 253.6 $ (25.9)
*Includes net reimbursements to and from our partners pursuant to agreements that include cost-sharing arrangements.
(1) Research and development expenses include wind down costs of terminated programs including the vibecotamab, tidutamab, XmAb841, XmAb104, XmAb662, and XmAb564 programs
Research and development expenses decreased by $25.9 million in 2024 over 2023 amounts primarily due to decreased spending on the wind down costs of terminated programs, partially offset by increased spending on programs such as XmAb819, XmAb657 and XmAb942.
General and Administrative Expenses
General and administrative expenses increased by $7.8 million in 2024 over 2023 amounts primarily due to increases in general and administrative compensation costs and additional spending on professional fees.
Other Income (Expense), Net
Other expense, net, for the year ended December 31, 2024, consists primarily of non-cash interest expense related to the Ultomiris and Monjuvi Royalty Agreements, an impairment expense related to the investment in Zenas' preferred stock, and unrealized losses on equity securities, partially offset by interest income from marketable debt securities during the year, while other income, net, for the year ended December 31, 2023, consists primarily of interest income from marketable debt securities, partially offset by non-cash interest expense related to the Ultomiris and Monjuvi Royalty Agreements during the year.
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Liquidity and Capital Resources
Since our inception, our operations have been primarily financed through proceeds from public offerings, private sales of our equity, and payments received under our collaboration and development partnerships and licensing arrangements. We have devoted our resources to funding research and development programs, including discovery research, preclinical and clinical development activities.
We have incurred substantial operating losses since our inception, and we expect to continue to incur operating losses into the foreseeable future as we advance the ongoing development of our antibody product candidates, evaluate opportunities for the potential clinical development of our other preclinical programs, and continue our research efforts.
In November 2023, we entered into the Monjuvi Royalty Sale Agreement and Ultomiris Royalty Sale Agreement and received total proceeds from the transactions of $215.0 million. For further discussion of the sale of future royalties, refer to Note 11 in the accompanying notes to the consolidated financial statements included in Part II, Item 8. Consolidated Statements and Supplementary Data of this Annual Report.
On February 27, 2023, we filed an automatic universal shelf registration statement on Form S-3 (File No. 333-270030) as a well-known seasoned issuer as defined in Rule 405 under the Securities Act of 1933, as amended, which became effective upon filing (the Shelf Registration Statement). The Shelf Registration Statement allows us to offer an indeterminate amount of securities, including equity securities, debt securities, warrants, rights, units and depositary shares, from time to time as described in the Shelf Registration Statement. The specific terms of any offering under the Shelf Registration Statement will be established at the time of such offering. The Shelf Registration Statement will expire on February 27, 2026.
On February 27, 2023, we entered into a sales agreement (the Sales Agreement) with SVB Securities LLC (the Agent) pursuant to which we may offer and sell, from time to time, through the Agent (the ATM Offering), shares of our common stock having an aggregate offering price of up to $200 million (the ATM Shares). Any ATM Shares offered and sold in the ATM Offering are to be issued pursuant to the Shelf Registration Statement and the 424(b) prospectus supplement relating to the ATM Offering dated February 27, 2023 (the ATM Prospectus). From the date of the ATM Prospectus through December 31, 2024, no shares of our common stock were sold pursuant to the ATM Offering and, as of December 31, 2024, we may sell shares of our common stock for remaining gross proceeds of up to $200 million from time to time pursuant to the ATM Prospectus.
On September 12, 2024, we completed an underwritten public offering (the Public Offering) of our common stock pursuant to the Shelf Registration Statement. In the offering, we sold 8,093,712 shares of our common stock at the public offering price of $18.00 per share, which included the exercise in full by the underwriters of their option to purchase 1,458,600 shares of our common stock, and pre-funded warrants to purchase up to an aggregate of 3,088,888 shares of our common stock at the public offering price of $17.99 per share. Upon the closing of the offering, we received gross proceeds of approximately $201.3 million.
At December 31, 2024, we had $706.7 million of cash, cash equivalents, and marketable debt securities compared to $697.0 million at December 31, 2023. We expect to continue to receive additional payments from our collaborators for research and development services rendered, additional milestone, contingent payments, opt-in and royalty payments. Our ability to receive milestone payments and contingent payments from our partners is dependent upon either our ability or our partners’ abilities to achieve certain levels of research and development activities and is therefore uncertain at this time.
Funding Requirements
We have not generated any revenue from product sales and do not expect to do so until we obtain regulatory approval and commercialize one or more of our product candidates. At the current stage of our clinical development programs, it will be some time before we expect to achieve this, and it is uncertain that we ever will. We expect that our operating expenses will continue to increase in connection with ongoing and planned clinical and preclinical development of product candidates in our pipeline. We expect to continue our collaboration arrangements and will look for additional collaboration and licensing opportunities.
Although it is difficult to predict our funding requirements, based upon our current operating plan, we believe that our existing cash, cash equivalents and marketable securities, together with interest thereon and expected milestone and
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royalty payments will be sufficient to fund our operations into 2028. We have based these estimates on assumptions that may prove to be wrong, and we could use our capital resources sooner than we currently expect.
Cash Flows
The following table sets forth the primary sources and uses of cash and cash equivalents for each of the periods presented below (in thousands):
Year Ended December 31,
2024 2023
Net cash provided by (used in):
Operating activities $ (202,188) $ (77,926)
Investing activities (7,872) (111,065)
Financing activities 197,152 189,219
Net increase (decrease) in cash and cash equivalents $ (12,908) $ 228
Operating Activities
Net cash used in operating activities for the year ended December 31, 2024 increased as compared to the same period in 2023 primarily due to lower research collaboration and milestone revenues and the decrease in royalty payments received as a result of the sale of future royalties in 2023 as the majority of our royalty revenue is now non-cash royalty.
Investing Activities
Net cash used in investing activities consists primarily of purchases of marketable debt securities available-for-sale, acquisition of intangible assets and purchases of property and equipment, offset by proceeds from maturities of marketable debt securities. Net cash used in investing activities for the year ended December 31, 2024 decreased as compared to the same period in 2023 primarily due to decreases in purchase of marketable debt securities and property and equipment.
Financing Activities
Net cash provided by financing activities during the year ended December 31, 2024 consists primarily of proceeds from the Public Offering. Net cash provided by financing activities during the year ended December 31, 2023 consists primarily of cash from the sale of future royalties under the Ultomiris and Monjuvi Royalty Sale Agreement.
Contractual Obligations and Commitments
We are obligated to make future payments to third parties under in-license agreements, including sublicense fees, royalties, and payments that become due and payable on the achievement of certain development and commercialization milestones. We have also entered into agreements with third-party vendors which will require us to make future payments upon the delivery of goods and services in future periods.
In April 2021, we entered into a license agreement with BIO-TECHNE Corporation (BIO-TECHNE) for a non-exclusive license to a certain recombinant monoclonal antibody reactive with human CLDN6. This antibody is being developed in our XmAb541 program. Under this license agreement, we may be required to make $30.6 million in additional contingent payments which include $1.8 million of clinical milestones, $4.8 million of regulatory milestones and milestones on the achievement of certain sales of $24.0 million, in addition to royalties upon commercial sales of products of 0.5%. We made an upfront payment in connection with this license in 2021 and made a milestone payment of $0.4 million in 2024 upon an initiation of Phase 1.
In February 2016, we entered into a worldwide exclusive commercial license agreement with Selexis SA to develop and commercialize products produced from the Selexis cell line that was manufactured in connection with our plamotamab drug candidate. In connection with the license, we may be required to make CHF 1.7 million in additional contingent obligations which include CHF 500,000 in development milestones, CHF 400,000 in regulatory milestones and
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CHF 800,000 in sales milestones, in addition to royalties upon commercial sales of products of less than 1%. In 2022, we recorded a milestone of CHF 200,000 upon initiation of Phase 2.
In December 2017, we entered into worldwide exclusive commercial license agreements with Selexis to develop and commercialize products produced from the Selexis cell line that was manufactured for certain bispecific antibody candidates. The terms for each agreement are identical and for each licensed cell line we may be required to make up to CHF 1.4 million in total development, regulatory and sales milestones which include CHF 425,000 in development milestones, CHF 340,000 in regulatory milestones and CHF 680,000 in sales milestones. In addition, we may be obligated to pay royalties upon commercial sales of approved products of less than 1%. In 2019, we made a milestone payment of CHF 75,000 in connection with an IND submission, and in 2020, we recorded a milestone payment due of CHF 75,000 in connection with an IND submission. In 2021, we recorded a milestone payment due of CHF 170,000 upon initiation of Phase 2.
In September 2020, we entered into an agreement with MD Andersen in which we agreed to provide up to $10.0 million in funding over a five-year period in exchange for MD Andersen conducting clinical studies with our drug candidates. In December 2021, we amended the agreement to extend it an additional year at the same level of funding. In December 2024, we further amended the agreement to provide that only two studies will continue under the agreement and Xencor's funding obligation to MD Anderson under the agreement is limited to the $2.0 million already paid and an additional $2.4 million to fund the continuing studies.
In August 2022 and in December 2022, we entered into agreements with Caris Life Sciences to license novel targets identified from their technology platform. The terms for the agreements provide that we may be obligated to pay development, regulatory and sales milestones for each target we elect to license in addition to royalties on net sales of approved products.
As the amount and timing of sublicense fees and the achievement and timing of these milestones are not probable and estimable, such commitments have not been included on our balance sheet or in the contractual obligations and commitment tables above.
In November 2023, we entered into the Monjuvi Royalty Sale Agreement and Ultomiris Royalty Sale Agreement and received total proceeds from the transactions of $215.0 million. For further discussion of the sale of future royalties, refer to Note 11 - Sale of Future Royalties in the accompanying notes to the consolidated financial statements included in Part II, Item 8. Consolidated Financial Statements and Supplementary Data of this Annual Report.
New Accounting Pronouncements
See Note 1 - Recent Accounting Pronouncements in the accompanying financial statements for information regarding recent accounting pronouncements.